fischer FFB-ES ElastoSeal is a one part water based acrylic coating which has been designed to provide smoke and fire protection on construction joints in both vertical and horizontal appliations. Tested to BS EN1366-4 and BS476-20 the FFB-ES is also ETA approved and CE marked. Developed for use on 80kg/m³ stone wool base the FFB-ES is also halogen and solvent free and exhibits excellent slump and movement characterestics.